The tour and the guide were really good, food was fine.
Docked stars because I rented a head torch which barely worked (most other people had the same issue with the rented head torches) and they also overbooked the tour - should've been 12 people but we were with 14, which meant we were really crammed in the bus there and back, and also in the night's accommodation. Literally shoulder to shoulder in sleeping bags, continually being woken up when someone rolls over.